157744389 has 8 divisors (see below), whose sum is σ = 229446432. Its totient is φ = 95602640.

The previous prime is 157744303. The next prime is 157744393. The reversal of 157744389 is 983447751.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157744389 - 2⁸ = 157744133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157744789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2390034 + ... + 2390099.

It is an arithmetic number, because the mean of its divisors is an integer number (28680804).

Almost surely, 2^157744389 is an apocalyptic number.

It is an amenable number.

157744389 is a deficient number, since it is larger than the sum of its proper divisors (71702043).

157744389 is a wasteful number, since it uses less digits than its factorization.

157744389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4780147.

The product of its digits is 846720, while the sum is 48.

The square root of 157744389 is about 12559.6333147111. The cubic root of 157744389 is about 540.3203277768.

The spelling of 157744389 in words is "one hundred fifty-seven million, seven hundred forty-four thousand, three hundred eighty-nine".